硼笼化合物对含铝液固高能燃料点火及燃烧性能的影响

为了探究硼笼化合物对液固凝胶型高能燃料的点火及燃烧性能的影响,采用高密度碳氢燃料MCRI-1、辅助分散剂胶凝剂和纳米铝粉为原料,制备了系列含铝液固凝胶型高能燃料(简称含铝高能燃料),并考察了含铝高能燃料的组成对其分散稳定性(即凝胶成型效果)的影响。在此基础上,考察了三种硼笼化合物对含铝高能燃料的密度、热值、点火及燃烧性能的影响。结果表明,提高胶凝剂含量或固液质量比(Al/MCRI-1)均可提高含铝高能燃料的分散稳定性。含铝高能燃料的密度和体积热值随着硼笼化合物的添加略有降低,但其质量热值在添加硼笼T和硼笼A后分别增加了11.6%和12.4%。硼笼化合物可将含铝高能燃料的燃温峰值提高21.1%～52.9%,点火延迟缩短44.5%～65.2%。硼笼化合物明显改善了含铝高能燃料的点火及燃烧性能。整体上,硼笼A添加效果最佳,且热解及燃烧可产生较多的气体,一定程度上增强了含铝高能燃料的膨胀做工能力。

Effects of Boron Cage Compounds on Ignition andCombustion Performance of Liquid-Solid HighEnergy Fuels Containing Nano-Al

To investigate effects of boron cage compounds (BCC) on the ignition and combustion performance of liquid-solid gel-type high energy fuels (LSGHEF), high density hydrocarbon fuel MCRI-1, auxiliary dispersant Gelatinizer and nanometre aluminium (Nano-Al) as raw materials were used to prepare series of LSGHEF. Effects of LSGHEF compositions on the dispersion stability (gelling effect) were investigated. Furthermore, Effects of three BCC on the density, calorific value, ignition and combustion performance of LSGHEF were also studied. The results show that the dispersion stability of LSGHEF can be improved by increasing the content of auxiliary dispersant Gelatinizer or Al/MCRI-1 mass ratio. BCC have a little negative impact on the density and volume calorific value of LSGHEF. However, mass calorific value increases by 11.6% and 12.4% with adding BCC-T and BCC-A respectively. BCC significantly increase the combustion peak temperature with growth of 21.1%~52.9% of gel-type high energy fuels containing Nano-Al. Moreover, the ignition delays are reduced by 44.5%~65.2%. In short, BCC substantially improve the ignition and combustion performance of gel-type high energy fuels containing Nano-Al, in which BCC-A performs best with enhancing the expansion work due to more gaseous products generated by thermal cracking and combustion.